The DataGrid will not be in the release next week. We are making just an update of the RC to include some fixes that we have made so far. The RadGridView (yes, this is the official name :-) will be available with the official release.
One important new thing is the integration between the PageNavigation and the Browser history for ASP.NET Ajax web pages.
Another new thing that you will be able to play is the RadContextMenu.
All the best,
the Telerik team
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